Motor data and controller adjustments of the synchronous motor
© KEB, 2012-10 COMBIVERT F5-A, -E, -H Page 7.6 - 13
7
Resistance (dr.48 = 3)
Measurement of the the resistance occurs with DC current in phase U to V.
The measurement is started with dr.48 = 3. The resistance value is entered in dr.30 in case of successful iden-
tication.
Calculation of the current controller from equivalent circuit data (dr.48 = 5)
The current controller parameters are calculated from the pre-identied equivalent circuit data with the adjust-
ment of dr.48 = 5. Is not identifed in the automatic mode if this calculation should occur before the identication
of the EMC.
EMC with motion (dr.48 = 6)
The drive accelerates to a rated speed of 60% for the identication of the EMC. The ramp of dr.49 (Lh.ident.
acc/dec time) is used for the acceleration. The general speed limits of the oP parameters are valid! (see chapter
7.4 setpoint setting)
This measurement is only possible if the EMC adaptation of nn.00 (motor model adjustment) is activated (de-
fault setting!).
The value is written in dr.26 (DSM EMC peak value) and additionally in dr.63 (DSM EMC HR) if the identication
is successful executed.
Parameter dr.63 has a higher resolution and is suitable for applications with high frequencies.
Deadtime detection (dr.48 = 9…13)
The deadtime detection works only as single identication if the stator resistance is correct entered/identied.
The measured values can be read out via In.39 "deadtime selector" and In.40 "deadtime".
The measured deadtime compensation characteristics are effective during operation, if uF.18 "deadtime comp.
mode" is adjusted to value 3: "automatically" The characteristics are not cleared by Fr.01 "load default set" .
Torque detection (dr.48 = 14…18)
This should be executed only if the application really requires increased torque accuracy. The displayed idling
torque in ru.12 (actual torque) is subtracted during operation, so that the real shaft torque is displayed.
This residual torque is partly caused by switching frequency-dependent losses in the inverter and also by me-
ans of friction losses.
The torque offset of the complete drive for the different switching frequencies is measured with dr.48 = 14...18.
Thereby the drive accelerates in 16 steps with the adjusted ramp in dr.49 to maximum 1,3-fold synchronous
speed. The general speed limits of the op parameters are effective.
The measured residual torque is stored and interpolated as correction characteristic.
The torque offset characteristic can be read out with parameters dr.58 "torque offset selectort" and dr.59 "torque
offset".
The characteristics are deleted by Fr.01 -4 "copy parameter set" and also by Fr.10 "load motor dependent
data.".
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